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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Does AGN fraction depend on redshift or luminosity? An extinction-free test by 18-band near- to mid-infrared SED fitting in the AKARI NEP wide field
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Does AGN fraction depend on redshift or luminosity? An extinction-free test by 18-band near- to mid-infrared SED fitting in the AKARI NEP wide field

机译：AGN分数是否取决于红移或亮度？ 在Akari Nep宽领域的18频段接近中红外线装配无灭绝测试

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摘要

Revealing what fraction of galaxies harbor active galactic nuclei (AGNs) is central to understanding the black hole accretion history of the universe. However, optical and soft X-ray surveys miss the most highly obscured AGNs. Infrared (IR), instead, is more robust against absorption. Previous IR photometric surveys, however, only had four or five filters in mid-IR. Our AKARI North Ecliptic Pole wide field sample has 18 filters in mid-IR (nine from AKARI, four from WISE, and five from Spitzer), for the first time allowing a sophisticated mid-IR spectral energy distribution (SED) fitting diagnosis for a statistical number of sources (89178 over 5.4 deg(2)). By using an SED fitting technique, we investigated the evolution of AGN fraction as a function of redshift and IR (8-1000 mu m) luminosity in an extinction-free way. We found that the AGN fraction (F-AGN) shows no sign of strong redshift evolution. Instead, F-AGN increases with increasing IR luminosity in all redshift bins (0 < z < 2).
机译：揭示港口港有活跃的银核（AGNS）的一部分是理解宇宙的黑洞积极历史的核心。但是，光学和软X射线调查错过了最强烈的AGN。相反，红外（IR）更加稳健地对吸收。然而，以前的IR光度调查仅在中红外有四个或五个过滤器。我们的Akari North Ecliptip杆宽场样品在Mid-IR中有18个过滤器（来自Akari的九个，四个来自Wise，来自Spitzer的五个），首次允许一个复杂的中红外光谱能量分布（SED）拟合诊断统计数量（89178超过5.4°（2））。通过使用SED拟合技术，我们将AGN分数的演变为以无偏移的方式作为红移和IR（8-1000μm）亮度的函数。我们发现AGN分数（F-AGN）显示出强烈的红移进化的迹象。相反，在所有红移箱中增加红外亮度（0

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